JPH01125753A - Magnetic recording/reproducing device - Google Patents

Abstract

PURPOSE:To prevent a tape from being damaged in a half loading state by controlling the feed position of the tape so that the tape can be evaded from the feed path of the tape in a recording/reproducing mode and it can be fed on a position separated from the outer periphery of a rotary drum in a fast feeding/rewinding mode. CONSTITUTION:A swing arm 62 turns in a counterclockwise direction in the recording/reproducing mode, thereby, an arm 29 having a guard ball 28 turns in a clockwise direction, then, it is evaded to the position not disturbing the movement of a mounting member 11, that is, the outside of a tape path. Also, in the fast feeding/rewinding mode, the half loading state is set, and the feed position of the tape 80 is regulated by the guard ball 28, and is fed without being being brought into contact with the rotary drum 6. In such a way, it is possible to evade inconvenience such that the tape is wound on a part of the outer periphery and damaged.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a magnetic recording/reproducing apparatus, and more particularly to a magnetic recording/reproducing apparatus configured to run a tape at high speed in a half-loading state in a fast forward seven rewind mode.

Conventional technology For example, in magnetic recording/playback devices such as video tape recorders, the tape is run at high speed in fast forward and 7 rewind modes, and at this time, control signals recorded on the tape are detected to change the tape running state. - In order to display the near-time counter in minute and second units, a half-loading mechanism is used that slides the tape into contact with the audio control head without wrapping the tape around the outer circumference of the rotating drum.

In this half-loading mechanism, for example, a tape loading member that wraps the tape around a rotating drum is fitted into a tape cassette, and a guide arm that attaches the tape to an audio control head rotates to load the tape from inside the tape cassette. It's like pulling it out. However, the tape pulled out by the guide arm winds around the rotating drum because there is not much distance between the rotating drum and the tape cassette due to miniaturization of the device. Therefore, in the fast forward 7 rewind mode, the tape fed out from the supply reel slides on a part of the outer periphery of the rotating drum, passes through the guide ball that stands vertically from the tip of the guide arm, slides on the audio control head, and then slides on the audio control head. It is wound onto the take-up reel.

Problems to be Solved by the Invention In the above-mentioned conventional magnetic recording/reproducing device, in the half-loading state during the fast forward and rewind modes, the tape runs while sliding against the inclined outer circumference of the rotating drum. It gets twisted and you end up driving at high speed. Therefore, in the conventional apparatus, when the tape is in a half zeroing state, the tape running becomes extremely unstable and the tape may be damaged.

Therefore, an object of the present invention is to provide a magnetic recording/reproducing device that solves the above problems.

Means and Effects for Solving the Problems The present invention provides the magnetic recording/reproducing apparatus described above, in which the tape is avoided from the tape running path during the recording/reproducing mode, and at a position where the tape is spaced from the outer periphery of the rotating drum during the fast forward and rewind modes. The tape is equipped with a regulating member that regulates the tape running position so that the tape runs in the fast forward 7 rewind mode, so that the tape runs without sliding against the rotating drum and prevents damage to the tape in the half-loading state. This is what I did.

Embodiment FIGS. 1 and 2 show an embodiment of the magnetic recording/reproducing apparatus according to the present invention.

In both figures, a magnetic recording/reproducing device 1 directly connects a standard tape cassette 2 (indicated by a dashed line in FIG. 1) or a small tape cassette 3 (indicated in FIGS. 4(A) and (B)) to the vRS. It is configured so that it can be done.

Before explaining the configuration of the apparatus 1, the standard tape cassette 2 and the small tape cassette 3 will be explained first.

The standard tape cassette 2 has a housing 2 as shown in FIG.
A supply side reel and take-up side reel (both not shown)
A tape 12c is provided on the front surface of the housing 2a to protect the front tape path 2b. In addition, the bottom of the housing 2a has a hub hole 2d for the supply reel, a hub hole 2e for the take-up reel,
A hole 2f into which a light emitting element for tape end detection is inserted is open.

Roughly on the front side of the bottom of the housing 2a are a guide roller 10b of a loading member 10 on the supply side, which will be described later, and an inclined ball 10.
c and a recess 2q into which the tension ball 13a is fitted;
A recess 2h into which a guide 0-ra 11b, an inclined ball 11C, a half-loading ball 25, and a guide ball 23 of the winding-side loading member 11, which will be described later, are fitted is formed.

As shown in FIGS. 4(A) and 4(B), the small tape cassette 3 has a lid 3b on the front of the housing 3a, and a hub hole 3C for a take-up reel (not shown) on the bottom. It's open.

Also, a take-up reel (not shown) is provided at the bottom and side of the housing 3a.
A part of the gear 3d provided in the body is exposed.

Further, on the front side of the bottom of the small tape cassette 3, there is a recess 3f in which a guide roller 10b, an inclined ball 10c, and a tension ball 13a on the supply side, which will be described later, are fitted, and a guide roller 11b1, an inclined ball 11C, and a half-loading ball on the winding side, which will be described later. A recess 3Q into which the guide ball 25 fits, and a recess 3h into which the guide ball 23 and the light emitting element 35 fit are formed.

In this way, the standard tape cassette 2 and the small tape cassette 3 not only differ in size and external shape, but also differ in the distance between the supply reel and the take-up reel.
Furthermore, the method of driving the take-up reel is also different.

To install the standard type tape cassette 2 and the small tape cassette 3 in the same device 1, as shown in Fig. 4(C).
As shown by the middle broken line, the hub hole 2d on the supply side of the standard tape cassette 2 and the hub hole 3C of the small tape cassette 3 are made to match.

As a result, the recess 3f of the small tape cassette 3.

3a and 3h are the recesses 2q of the standard tape cassette 2.

It is located inside the tape cassette from 2h.

Next, a schematic configuration of the device 1 will be explained.

As shown in FIG. 1, a drum base 5 is mounted and fixed on the chassis 4, and a rotating drum 6 having a magnetic head (not shown) is provided on the drum base 5. Also, there are arc-shaped guides on the chassis 4 on both the left and right sides of the rotating drum 6. II7.8 is drilled.

These guide grooves 7, 8 correspond to the mounting position of the standard type tape cassette 2 shown in FIG. 3 and the mounting position of the small tape cassette 3 shown in FIG. 4, and are extended toward the tape cassette side compared to the conventional device. There is. Note that the guide groove 8 on the tape winding side (right side) is formed longer than the guide groove 7 on the tape supply side (left side).

10.11 is a tape loading member, which has guide grooves 7,
Insert a bottle (not shown) on the bottom side into the guide groove 7.
Loading base 1 movably provided along 8
0a, 11a, guide rollers 10b, 11G vertically extending from the loading bases 10a, 11a, and the loading base 10a.

An inclined ball 10c projects obliquely from 11a.

11C. Also, tape loading member 10.
11 is driven by a loading drive mechanism 9, which will be described later, and moves to the first unloading position (shown in FIG. 1) where it fits into the tape cassette 2 when the standard tape cassette 2 is loaded, and also moves the small tape cassette 2 to the first unloading position (shown in FIG. 1). When the cassette 3 is loaded, it moves to the second unloading position (shown in FIG. 5(A)) where the small tape cassette 3 is inserted.

The drum base 5 is also provided with V-shaped stoppers 5a and 5b that protrude above the guide groove 7.8, and the tape loading member 10.11 is moved along the guide groove 7.8 as described later. Arrow A.

When moving in the direction B (shown in FIG. 1), the stopper 5a
, 5b and stops at the tape loading completion position.

Note that a plate spring 12 that protrudes in the traveling direction is attached to the loading base 10a of the tape loading member 10 on the tape supply side.

Reference numeral 13 denotes a tension arm, which has a vertical tension ball 13a at its tip and is supported by a shaft 4a on the chassis 4. Further, one end of a coil spring 14 (indicated by a broken line in FIG. 1) is hooked to the arm portion 13b of the tension arm 13, and the other end of the coil spring 14 (indicated by a broken line in FIG. It is rotated counterclockwise by tensile force. Therefore, the tension arm 13 is connected to the tape loading member 10 on the supply side at that time! 11, comes into contact with the loading base 10a,
It rotates following the movement of the loading base 10a.

Also, links 15a, 1 are provided in the middle of the tension arm 13.
A toggle member 15 is rotatably connected to the toggle members 5b in a dogleg shape, and one end of a brake band 16 is locked to this toggle member 15. The other end of the brake band 16 is a fixed member 17 fixed to the chassis 4.
The reel stand 18a is engaged with the reel stand 18a on the supply side and faces the outer periphery of the reel stand 18a on the supply side.

The toggle member 15 is configured to be displaced in a dogleg shape as shown in FIG. 1, but not in the opposite direction. Therefore,
When the loading member 10 is in the first and second unloading positions as shown in FIGS. 1 and 5 (A>),
The toggle member 15 is displaced in a dogleg shape and the brake band 16
The remaining 51 sag is absorbed. Therefore, the brake band 16 does not slacken significantly and is spaced apart from the reel stand 18a.

A full-width erase head 19 is placed and fixed on the erase base 20. The erase base 20 is rotatably supported by a shaft 20a, and an impedance roller 21 and a guide ball 22 are provided on its upper surface.

23 is a guide ball that stands vertically at the tip of the guide arm 24. 25 is a half-loading ball that stands vertically from the tip of the half-loading arm 26. The guide ball 23 and the half-loading ball 25 have arms 24.26 driven by a ball moving mechanism 27 (to be described later), and a first unloading ball that fits into the standard tape cassette 2 depending on the type of tape cassette to be loaded. position (as shown in FIG. 1) or into a second unloading position (as shown in FIG. 5) where it fits into the miniature tape cassette 3. Note that the half loading arm 26, the guide arm 24, and the ball moving mechanism 27 constitute a half loading mechanism 82.

Reference numeral 28 denotes a guard ball (regulating member) which regulates the tape traveling position so that the tape does not slide against the rotating drum 6 during half loading, and extends vertically from the tip of the guard ball arm 29.

The guard ball 28 is located close to the rotating drum 6 and between the rotating drum 6 and the tape bus of the tape cassette 2 or the small tape cassette 3. Therefore, as will be described later, the tape pulled out from the tape cassette 2 or the small tape cassette 3 slides against the guard ball 28 to form a tape bus that travels at a position spaced apart from the rotating drum 6.

Further, the guard pole arm 29 is driven by a ball moving mechanism 27 as described later. That is,
During recording/playback mode operation, the guard pole arm 29 rotates significantly clockwise so as not to interfere with the movement of the tape loading member 11 in the direction of arrow B, thereby avoiding the movement of the tape bus and the tape loading member 11. .

Note that the guide ball 23, half-loading ball 25, and guard ball 28 are displaced according to each mode, and details will be described later.

30 is a capstan, which is a capstan motor 30a arranged on the bottom side of the chassis 4 (indicated by a broken line in FIG. 1).
is driven to rotate counterclockwise.

31 is a pinch roller, an arc-shaped pinch roller arm 3
2 is rotatably supported at the tip of the capstan 3o, and is pressed against the capstan 3o by the upward and downward rotation of the bottle roller arm 32 and the horizontal rotation of the base 33 that supports the pinch roller arm 32 during recording/reproduction. do.

Details of the pinch roller drive mechanism 34 that operates the pinch roller 31 in this manner will be described later.

Reference numeral 35 denotes a light emitting element for tape end detection, which stands vertically from the tip of an arm 36 supported on the shaft 4b on the chassis 4.

Note that the arm 36 is urged to rotate counterclockwise by the tensile force of a coil spring 37. Normally, the arm 36 abuts the bin 4C protruding from the chassis 4 and is located at a position M (as shown in FIG. 1) corresponding to the hole 2f of the standard tape cassette 2.

Also, when the small tape cassette 3 is installed, the arm 36
is pressed by the arm 24 rotating counterclockwise, and the light emitting element 35 is placed in the position where it is inserted into the small tape cassette 3 (the fifth
(as shown in the figure).

81 is the audio control head, rotating drum 6
and the capstan 30, and is attached to a control track and an audio track (both not shown) of the tape to record/reproduce control signals and audio signals.

The general configuration of the magnetic recording/reproducing device W1 has been described above, and next, each mechanism for operating each member will be described in detail.

■ [Loading Drive Mechanism] As shown in FIG.
．． Worm gear 4 via gear 42 meshing with gear 41
3. A main cam gear 44 and a worm gear 43 mesh with the worm gear 43 from the horizontal direction.
A sub cam gear 45 that meshes vertically with rotates.

As shown in FIG. 6, the main cam gear 44 is rotated by a main gear 44' that is integral with the main cam gear 44.

It is transmitted via gears 46, 47, 48, 49 to ring gear IIIi 50, which drives τ loading member 'to, ii.

This ring gear mechanism 50 is disposed below the rotating drum 6, and includes a ring gear 50a meshing with the gear 49, a ring gear 50b disposed above the ring gear 50'a,
50c.

Each of the ring gears 50a, 50b, and 50c is coaxially and rotatably supported by three O-ruars 51a, 51b, and 51c that are in sliding contact with the inner circumferential side.

Further, as shown in FIGS. 5(A) and 7(A), the base 10a of the tape loading member 10 on the supply side is connected to a ring gear 50a via a connecting member 55. Note that one end of the connecting member 55 is connected to a sliding member 57 that is biased in the direction of arrow C by the tensile force of a coil spring 56 that is slidably provided on the ring gear 50a.

Further, as shown in FIGS. 5(A) and 7(C), the base 11a of the tape loading member 11 on the winding side is connected to the ring gear 50C via a connecting member 58. The connecting member 58 is connected to a sliding member 59 provided on the ring gear 50C so as to be freely rfIvJ, and the sliding member 59 is biased in the direction of the arrow by the tensile force of the coil spring 60.

Accordingly, the loading members 10.11 are rotated by the guide grooves 7, 10, 11 as the ring gears 50a, 50b, and 50G rotate, respectively.
Move along 8.

The rotation of the ring gear 50a is controlled by the gear 52. The signal is transmitted to the ring gear 50b via a gear 53a that meshes with the gear 52 and a gear 53b that is integrated with the gear 53.

Further, the rotation of the ring gear 50a is controlled by the gear 52. A small diameter gear 54a that meshes with the gear 52, and a gear 54 that is integrated with the gear 54a.
Furthermore, as shown in FIGS. 7(A), (B), and (C), the ring gear 50a has a gear portion 50 that meshes with the gear 49 on the outer periphery of the ring gear 50a.
a1 is formed within the range of angle α. Further, on the outer periphery of the ring gear 50b, there is a gear portion 50b+ that meshes with the gear 53b.
is formed within the range of angle β. Also, ring gear 50
A gear portion 50C+ that meshes with the gear 54b is formed on the outer periphery of c in the range of angle γ.

The ring gears 50b and 50c are stacked on top of each other as shown in FIG. 5(B) and are integrally coupled.

The ring gears 50b and 50c are shown in FIG. 7(B), (
Because they are stacked as is in the state shown in C), the gear part 50
A portion of b1 and 50CI overlap, and the teeth of each gear portion 50b1 and the teeth of 500+ are integrated with the same pitch.

Since the ring gear 50a is driven by the gear 49, the loading member 10 rotates at a constant speed from the unloading position to the loading completion position. However, the ring gear 50b.

As will be described later, 50c is driven at a constant speed via gears 53a and 53b (reduction ratio -1) until the loading member 11 reaches the half-loading position from the unloading position, and from the half-loading position to the loading completion position. is accelerated and driven via gears 54a and 54b (reduction ratio: 1).

In this way, the ring gears 50b and 50c that move the tape loading member 11 on the take-up side are accelerated from the half-loading position and move from the guide groove 7 on the supply side to the take-up side, as shown in FIG. This is because the guide groove 8 has a longer overall length, and the tape loading member 10.1
This is to ensure that the two terminals reach the loading completion position at approximately the same time.

The tape loading member 10.11 moves from the first or second unloading position to the half-loading position by the rotation of each of the ring gears 50a, 50b, and 50c.
While moving to the loading completion position, the tape in the tape cassette 2.3 is pulled out and wound around the rotating drum 6.

Further, by reverse rotation of the ring gears 50a, 50b, and 50G, the tape is returned from the loading completion position to the first or second unloading position, and the tape is returned to the tape cassette 2.3.

■ "Ball Moving Mechanism" As shown in FIGS. 1 and 2, the lower surface of the main cam gear 44 that meshes with the worm gear 43 is shown in FIGS.
Cam grooves 44a and 44b shown in D) are formed.

A pin 61a of a slide lever 61 provided slidably in the directions of arrows X+ and X2 is fitted into one of the cam grooves 44a, and a pin 62a of a swing arm 62 is fitted into the cam Fi44b.

The slide lever 61 has a bottle 61b vertically extending from the other end of the slide lever 61, and a leaf spring 63 that holds the bottle 61b.
It is connected to the fan-shaped gear 63 via a. The sector gear 63 is rotatably supported by a pin 4d on the chassis 4.

Therefore, when the cam gear 44 rotates counterclockwise, the slide lever 61 slides in the direction of arrow x1 according to the rotation position of the cam groove 44b, and the sector gear 63 rotates clockwise accordingly. . Furthermore, the rotation of the fan-shaped gear 63 is transmitted to the gear 24a of the arm 24 via the gear 64, as shown in FIG.

As a result, arm 2 of half loading 111M82
4 rotates clockwise, and the guide ball 23 provided at the tip of the arm 24 moves to a position corresponding to each mode as the main cam gear 44 rotates, as shown in the cam diagram in FIG. 9(a). Displace.

Further, the rotation of the fan-shaped gear 63 is caused by the rotation of the gear 6 which meshes with the gear 64.
5a1 is transmitted to the gear 26a of the arm 26 having the half-loading ball 25 through a small diameter gear 65b1 which is integrated with this gear 65a and a gear 66 meshing with the small diameter gear 65b. Therefore, the arm 26 of the half-loading mechanism 82 rotates according to the rotational position of the cam groove 44b, and the half-loading ball 25 rotates with the rotation of the main cam gear 44, as shown in the cam diagram in FIG. 9(a). Displaces to the position according to each mode.

Further, the swing arm 62 is connected to a pin 67a of a swing gear 67 via a leaf spring 62b. The swing gear 67 is rotatably supported by the pin 4e, and the swing gear 67 is rotatably supported by the pin 4e.
It meshes with the Also, the swing gear 67 is a coil spring 6.
It is rotated counterclockwise by the tensile force of 9.

Therefore, as the cam gear 44 rotates clockwise,
The swing arm 62 that engages with the cam groove 448 rotates counterclockwise. As the swing arm 62 rotates, the swing gear 67 rotates clockwise, and the rotation is caused by the rotation of the gear 68.
Gear 2 of arm 29 with guard ball 2B through
9a. Therefore, the arm 29 is connected to the cam groove 448.
As shown in the cam diagram of FIG. 9(b), the guard ball 28 is displaced to a position corresponding to each mode as the main cam gear 44 is rotated.

That is, the arm 29 has a cam gear 44 of approximately 280 to 3101 mm.
When it rotates by a, it will rotate clockwise.

■"Pinch roller drive mechanism" 1st B! As shown in FIG. 1, a pinch roller arm 32 having a pinch roller 31 at its tip is supported by a shaft 33a supported by a base 33, and is supported by a torsion spring (not shown) wound around the shaft 33a. It is rotated upward by force. Therefore, the arm 32 is rotated so that the pinch row 531 moves upward. Further, the base 33 is rotatably supported on the chassis 4.

As shown in FIG. 10, a cam Fi44C for rotating the pinch roller and a cam groove 446 for pressing the pinch roller are provided on the upper surface of the main cam gear 44.

This cam 1Is44c has arrow Y+, Yz force direction 12
! A pin 70a of a freely movable slide lever 70 is fitted. Furthermore, one end of a rotating member 71 whose intermediate portion is rotatably supported is connected to the slide lever 70, and the other end of the rotating member 71 is connected to a slide rack that slides in the arrow Y+ and Y2 directions. 72.

The slide rack 72 has a rack 72a that meshes with the gear 33b of the base 33.

In addition, an arm 73 is provided in the cam groove 446 for pinch roller compression.
The arm 73 is connected to two plates 74 and 75 supported by the bin 4f. These two plates 74 and 75 are integrated by the tension of a coil spring 76.

The plate 75 is also provided with a bent portion 75a which comes into contact with the protruding pin 32a (shown in FIG. 2) at the intermediate portion of the arm 32 when the pinch roller arm 32 rotates. As will be described later, this bent portion 75a volatilizes the bottle 32a of the pinch roller arm 32 through the spring force of the spring 76 during recording/reproduction, and presses the pinch 0-531 onto the capstan 30.

Further, the sub cam gear 45 that meshes with the worm gear 43 in the vertical direction has a cam groove 45a, as shown in FIG. A pin 77a of an up-down arm 77 is engaged with the cam 45a, and the up-down arm 77 is rotatably supported by a bracket 78. Further, a roller 77 is provided at the end of the up-down arm 77.
b is provided.

The pinch roller arm 32 is rotationally biased so that the abutting portion 32b at the end abuts against the roller 77b of the up-down arm 77. Therefore, when the sub cam gear 45 rotates counterclockwise and the bin 77a moves inward, the up-down arm 77 rotates counterclockwise. and,
The pinch roller arm 32 rotates as the contact portion 32b is pressed upward by the roller 77a of the up-down arm 77, and the pinch roller 31 is lowered.

As shown in FIGS. 1 and 2, a reflection pattern (not shown) is formed on the front surface 45b of the cam gear 45 in order to detect the rotation angle for each mode. Further, three optical sensors 79 are provided at positions facing the front surface 45b of the cam gear 45, and the rotational position of the cam gear 45 is detected by a combination of detection signals obtained from the three optical sensors 79. In addition, main cam gear 44 and cam gear 45
Since they have the same diameter, the rotational position of the main cam gear 44 can also be detected from the detection signal of the optical sensor 79.

■ "Tension arm, erase base operation mechanism" As shown in Figs.
0a, and the loading base 10a moves to the first unloading position (tension ball 13
a is inserted into the recess 2q of the standard tape cassette 2) or a second unloading position (a position where the tension ball 13a is inserted into the recess 3f of the small tape cassette 3).

Therefore, the tension arm 13 is connected to the loading base 1.
0a moves in the direction of the arrow and rotates counterclockwise in four directions by the spring force of the spring 14.

As shown in FIG. 12, when the loading base 10a further moves in the direction of the arrow, the plate spring 12, which is spaced apart from the tension arm 13 but extends in the advancing direction, moves onto the sliding surface 20b on the lower side of the erase base 20 (see FIG. 12). Open while pressing (indicated by the broken line).

Therefore, the erase base 20 rotates counterclockwise around the shaft 20a, and the end 20G of the erase base 20 is rotated counterclockwise around the shaft 20a.
3. Therefore, the tension arm 13 is pressed against the end 20c of the erase base 20.

Furthermore, when the loading base 10a moves in the direction of the arrow and reaches the loading completion position, the loading base 10a passes the erase base 20, so the erase base 20 rotates clockwise and returns to its original position.

As will be described later, the tension arm 13 roughly rotates in the counterclockwise cutting direction from the position shown in FIG. 12 to fit the tension ball 13a into the recess 2Od of the erase base 20. As a result, the tension arm 13 reaches a position where a tape path is formed during recording/reproduction, and the toggle member 15 is extended linearly to bring the brake band 16 into sliding contact with the reel stand 18a on the supply side.

Furthermore, when returning from the loading completion state to the unloading position, the loading base 10a performs the opposite operation to the above, and the loading base 10a
When the loading base 10a returns, the plate spring 12 of the loading base 10a presses the sliding surface 20b of the erasing base 20. At that time, the erase base 20 rotates counterclockwise, and the end 20
c kicks the tension arm 13, and as a result, the tension arm 13 rotates clockwise, causing the tension ball 13a to separate from the recess 20d.

(1) Next, the operation in each mode when the standard tape cassette 2 is loaded in the magnetic recording/reproducing apparatus having the above configuration will be explained.

As shown in Fig. 1, a standard tape cassette 2 (in Fig. 1,
When a cassette (indicated by a dashed line) is inserted into the apparatus, a cassette detection switch (not shown) detects the type of cassette. The motor 38 is rotated by a command from a control circuit (not shown), and rotates the worm gear 43 as described above.

The main cam gear 44 is driven by the worm gear 43,
Rotate 90 degrees clockwise as shown in FIG. 8(B).

This rotation of the main cam gear 44 is transmitted to the ring gear mechanism 50 as explained in the above-mentioned section (2) "Loading drive mechanism". As a result, ring gear 50a rotates clockwise, and ring gears 50b and 50c rotate counterclockwise. The loading member 10.11 then reaches the first loading position shown in FIG.

Also, as explained in the previous ■ "Ball movement mechanism",
As the main cam gear 44 rotates, the ball moving mechanism 2
7 rotates the arm 24.26 to the first unloading position shown in FIG. Further, the tension arm 13 follows the loading member 10 and rotates to the first unloading position.

Therefore, when the standard tape cassette 2 is lowered to a predetermined mounting position in the apparatus, the guide balls 10b, 11b of the 0-ding member 10°11, the inclined ball 100.11C,
The tension ball 13a1, guide pole 23, and half-loading ball 25 fit into the recesses 2Q and 2h of the standard tape cassette 2 shown in FIG. Also, reel stand 18
a.

The upper part of 18b is the hub hole 2d of the standard tape cassette 2,
At the same time, the light emitting element 35 is fitted into the hole 2f.

Next, as shown in FIG. 8(C), the rotation of the motor 38 causes the main cam gear 44 to further rotate clockwise.

Therefore, the ring gear 50a.

50b, 50c will rotate further, and the tape loading member 10.11 will be spaced a small distance from the recesses 2Q, 2tl of the standard tape cassette 2 and will move to the half loading position (as shown in FIG. 13). Further, the tension arm 13 follows the tape loading member 10 and separates from the four portions 2g.

Furthermore, the guide ball 23 and half-loading ball 25 that had been fitted into the recess 2h are moved to the arrow X+ by the slide lever 61 that engages with the cam groove 44b of the main cam gear 44
As the force moves in the direction wJIIIJ, it is displaced to the position shown in FIG. 13 together with the arms 24, 26 which rotate clockwise.

At this time, the guide ball 23 at the tip of the arm 24 is displaced to a position close to the capstan 30, that is, between the capstan 30 and the tape cassette 2.

Further, the half-loading ball 25 at the tip of the arm 25 is displaced to a position close to the audio control head 81, that is, between the rotating drum 6 and the audio control head 81.

Therefore, the tape 80 pulled out from the standard tape cassette 2 is moved by the guide roller 10b, the guard ball 28°, the half-loading ball 25. Audio control head 81. Tape cassette 2 via guide ball 23
A tape bus is formed that returns to the inside. In addition, tape 8
0, the guard ball 28 has not yet been displaced and is positioned in front of the rotating drum 6, so it passes through a position spaced apart from the outer circumference of the rotating drum 6.

In addition, in the fast forward 7 rewind mode, the tape 80 is in the half-loading state shown in FIG.

Therefore, the tape 80 runs stably at high speed,
As in the past, it is wrapped around a part of the outer circumference of the rotating drum 6 and has a length of 1 m.
This eliminates the inconvenience of doing so.

Further, the tape 80 that has passed through the guard ball 28 runs while adhering to the audio control head 81.

That is, in the fast forward 7 rewind mode, the running state of the tape running at high speed in the half-loading state is counted in linear time units of hours, minutes, and seconds. It should be noted that the pinch low 531 remains in an upward movement during half loading.

Further, as shown in FIG. 8(C), during half loading, the pin 6 of the swing arm 62 engages with the cam groove 448.
2a is located in the wide portion 44a+, so that the swing arm 62 can rotate slightly clockwise. Therefore, the spring force of the spring 69 that energizes the swing gear 67 causes the arm 29 having the guard ball 28 to move in the opposite direction from Fi1.
The tape 8 can be rotated and biased in this direction.
Apply tension to 0. Therefore, during half-loading, the slack of the tape 80 is absorbed through the guard ball 28, and the tape 80 maintains the tape bath of the half-loading tray without loosening.

Here, the recording or playback mode is operated. This record/
The regeneration mode operation causes the motor 38 to further rotate, causing the main cam gear 44 to rotate clockwise as shown in FIG. 8(D).

As the main cam gear 44 rotates, the pin 62a of the swing arm 62 that engages with the cam groove 448 is displaced toward the inner circumferential side, so that the swing arm 62 rotates in the counterclockwise direction.

Therefore, the arm 29 having the guard ball 28 rotates significantly clockwise as shown in FIG. 14 and avoids the position where it does not interfere with the movement of the loading member 11, that is, to the outside of the tape bath.

Main gear 44', which is integral with main cam gear 44, also rotates in the same direction, causing ring gear 50a to further rotate clockwise and ring gears 50b and 50c to rotate counterclockwise. At that time, as described above, the gear portion 50b of the ring gear 50b and the gear 53b are disengaged, and the gear portion 50C+ of the ring gear 50c is released.
The gear 54b meshes with the gear 54b. Therefore, the loading member 10 on the supply side moves in the direction of the arrow B along the guide groove 7, and the loading member 11 on the winding side is further accelerated and moves in the direction of the arrow B along the guide groove 8.

Therefore, as shown in FIG. 14, the loading members 10, 11 abut on the stoppers 5a, 5b substantially simultaneously while wrapping the tape 80 around the outer periphery of the rotating drum 6, respectively.

Loading base io in contact with stoppers 5a and 5b
a, 1ib are each IJ ngya 5oa.

The spring force of the coil springs 56, 60 provided at 50c presses and holds the stoppers 5a, 5b.

As the loading member 1o on the supply side moves to the loading completion position shown in FIG. It is displaced between the roller 21 and the guide ball 22.

Therefore, the links 15a and 15b of the toggle member 15 connected in the middle of the tension arm 13 become straight.

Therefore, the tension arm 13 slides the brake band 16 into contact with the outer periphery of the reel stand 18 on the supply side via the toggle member 15 to apply pack tension to the tape 80.

Furthermore, as the main cam gear 44 rotates, the sub cam gear 45 (shown in FIG. 11) that meshes with the worm gear 43 rotates counterclockwise.

Therefore, as described above, the tape loading member 11 moves in the direction of arrow B along the guide groove 8, and the pinch roller 31 moves in the direction of arrow B.
9(C), the up-down arm 77 rotates counterclockwise along the cam groove 45a of the rear cam gear 45. Therefore, the contact portion 32b of the pinch roller arm 32 is pressed by the roller 77b of the up-down arm 77 and moves upward. Therefore, the pinch roller arm 32 rotates about the shaft 33a and lowers the pinch roller 31.

Also, a cam groove 44c on the upper surface side of the main cam gear 44.

44d also rotates clockwise as shown in FIG. 10(B), so the pin 70a of the slide lever 70 is in the cam groove 44c.
The slide lever 70 is displaced inward along the arrow Y.
Displaced in two directions.

Further, since the pin 73a of the arm 73 is displaced in the outer circumferential direction along the cam groove 44d, the arm 73 rotates clockwise.

Therefore, as shown in FIG. 9(C), after the pinch roller 31 descends, the slide lever 70 slides in the direction of arrow Y2, and this displacement is transferred to the slide rack 7 via the rotating member 71.
2. That is, the slide rack 72 moves in the direction of arrow Y1.
slide in the direction.

Therefore, the base 33 that engages with the rack 72a of the slide rack 72 rotates in the counterclockwise direction, and the pinch roller 31
The tape 80 is brought into contact with the capstan 30. Thereafter, as shown in FIG. 9(D), the arm 73 rotates clockwise, thereby causing the pair of plates 74 and 75 to rotate counterclockwise. As a result, the bent portion 75a of the plate 75 comes into contact with the protruding pin 32a of the pinch roller arm 32, and the spring force of the spring 76 urges the arm 32 in the counterclockwise direction.

In this way, the tape 80 is pressed toward the capstan 30 side by the pinch roller 31, runs toward the winding side, and is recorded or reproduced.

Note that the unloading operation is the opposite of the loading operation described above.

(2) Next, the case of mounting the small tape cassette 3 will be explained.

As shown in FIG. 5(A), the small tape cassette 3 (fifth
When a tape cassette (indicated by a two-dot chain line in the figure) is inserted into the apparatus, a cassette detection switch (not shown) detects that it is a small tape cassette.

Then, the motor 38 reversely rotates the worm gear 32 in response to a command from a control circuit (not shown), and rotates the main cam gear 4.
4 to the position shown in FIG. 8(A).

Due to the reverse rotation of the worm gear 32, the ring gear mechanism 50
The ring gear 50c rotates clockwise, and the other ring gears 50b and 50c rotate counterclockwise. Therefore,
The loading member 10.11 moves toward the small tape cassette 3 from the first unloading position shown in FIG.

As the loading base 10a on the supply side moves, the tension arm 13 rotates clockwise and reaches the second unloading position shown in FIG. 5(A). Further, due to the rotation of the cam groove 44b on the lower surface side of the main cam gear 44, the slide lever 61 that engages with the cam groove 44b slides in the two directions of the arrow.

Therefore, the aforementioned ball moving mechanism 27 operates, and the guide balls 23. The arm 24.26 with the half zeroing ball 25 rotates counterclockwise as shown in FIG. 5(A). Therefore, the guide ball 23 and the half loading ball 25 are displaced from the first unloading position shown in FIG. 1 to the second unloading position corresponding to the small tape cassette 3.

Therefore, when the small tape cassette 3 is lowered to a predetermined mounting position within the apparatus, the guide balls 10b, 11b, the inclined ball 100.11C, the tension ball 13a, the guide ball 23. The half-loading balls 25 fit into the recesses 3f, 3a, and 3h of the small cassette tape 3 shown in FIGS. 4(A) and 4(B).

Further, as the arm 24 rotates counterclockwise, the arm 36 having the light emitting element 35 rotates clockwise against the spring force of the spring 37. Therefore, the light emitting element 35 is also connected to the recess 3h of the small tape cassette 3 at the same time as the guide ball 23.
fit inside. Therefore, the light emitting element 35 does not get in the way when the small tape cassette 3 descends.

Further, as the small tape cassette 3 descends to the mounting position, the supply side reel stand 18a fits into the hub hole 3C. Furthermore, a drive gear (not shown) disposed on the lower side of the chassis 4 moves upward, and this drive gear meshes with the winding-side gear 3d. Therefore, the reel on the winding side is driven by this drive gear to wind up the tape.

Next, when the small tape cassette 3 is installed at a predetermined installation position, the motor 38 rotates in the same way as when the standard tape cassette 2 is installed, resulting in the half-loading state shown in FIG. 13. Therefore, even when the small tape cassette 3 is installed, the tape 80 pulled out from the small tape cassette 3 travels at a position separated from the rotating drum 6 by the guard ball 28, similarly to when the standard tape cassette 2 is installed. Then, the audio control head 81 is attached. Further, since the arms 24 and 26 rotate clockwise, the 7-arm 36 having the light emitting element 35 returns to its original tape end detection position by the spring force of the spring 37.

Furthermore, by operating the recording/playback mode, the same operation as with the standard tape cassette described above is performed.
The state shown in FIG. 14 is reached. Note that even when the small tape cassette 3 is installed, in the fast forward 7 rewind mode, the tape is in a half-loading state as shown in FIG.

Effects of the Invention As described above, in the magnetic recording/reproducing apparatus according to the present invention, when the tape is set in the fast forward 7 rewind mode, that is, when the half-loading state is set, the tape is stopped by the regulating member interposed between the rotating drum and the tape bus. Since the running position is regulated by the tape, the tape being wound at high speed can run at a position that is distant from the rotating drum.Therefore, the tape running is stable, and the detection of control signals by the audio control head is correspondingly more stable. At the same time, it is possible to prevent the tape traveling in a half-loaded state from being wound around the rotating drum and being damaged. or,
During recording/playback mode, the regulating member is avoided, so the loading operation of the tape loading member is not obstructed by the regulating member.Furthermore, when the regulating member is energized, tension is applied to the tape in the half-loading state. It has the advantage of being able to remove slack in the tape.

[Brief explanation of the drawing]

FIG. 1 is a plan view of an embodiment of the magnetic recording/reproducing device δ according to the present invention, FIG. 2 is a side view thereof, FIG. 3 is a perspective view for explaining a standard tape cassette, and FIG. FIG. 5 is a perspective view for explaining the small tape cassette, FIG. 5 is a diagram showing the state when the small tape cassette is installed, FIG. 6 is a plan view showing the ring gear mechanism, FIG. 7 is a plan view of each ring gear, and FIG. Figure 8 shows the cam groove on the bottom side of the main cam gear.
Fig. 9 is a cam diagram, Fig. 10 is a plan view showing the cam groove on the top side of the main cam gear, Fig. 11 is a rear view of the device as seen from the rear, and Fig. 12 is for explaining the operation of the tension arm. FIG. 13 is a plan view during half loading, and FIG. 14 is a plan view during recording/reproduction mode. DESCRIPTION OF SYMBOLS 1... Magnetic recording/reproducing device, 2... Standard tape cassette, 3... Small tape cassette, 6... Rotating drum, 7.8... Guide groove, 9... Loading drive mechanism , 10.11... tape loading member, 1
3... Tension arm, 13a... Tension ball, 15... Toggle member, 16... Brake band, 19... Full width erasing head, 23... Guide ball, 25... Half loading ball , 28...
Guard ball, 29...Guard ball arm, 30.
...Capstan, 31...Pinch roller, 32...
- Pinch roller arm, 34... pinch roller drive mechanism, 35... light emitting element, 38... motor, 44...
・Main cam gear, 44a. 44b, 44c, 44d...Cam groove, 45...Sub cam gear, 45a...Cam groove, 50...Ring gear mechanism, 50a, 50b, 50C...Ring gear, 61
...Slide lever, 62...Swing arm,
70... Slide lever, 71... Rotating member, 77
...up-down arm, 81...audio control head, 82...half loading structure. (-111111 Figure 8 + C1fil

Claims (1)

[Claims] In a magnetic recording/reproducing device having a half-loading mechanism that pulls out the tape in a tape cassette to a half-loading position between a rotating drum and the tape cassette and slides it into contact with an audio control head in the fast-forward/rewind mode, / characterized by comprising a regulating member for avoiding the tape running path in the playback mode and regulating the tape running position so that the tape runs at a position spaced apart from the outer periphery of the rotating drum in the fast forward/rewind mode. magnetic recording/reproducing device.